1. 1 Department of Applied Social Sciences, Faculty of Organization and Management , Silesian University of Technology ; Roosevelt St., 26, PL 41-800 Zabrze , Poland
2. 2 Oleg Balatskyi Department of Management , Sumy State University ; Rymskogo-Korsakova St., 2, 40007 Sumy , Ukraine
3. 3 Computer Science and Engineering Department , Carlos III University of Madrid ; De la Universidad St., 30, 28911 Leganés, Madrid , Spain
4. 4 Economic Cybernetics Department , Sumy State University ; Rymskogo-Korsakova St., 2, 40007 Sumy , Ukraine
5. 5 JSofteris ; 41-219 Sosnowiec , Poland
6. 6 Sumy Representative Office of the Insurance Company “VUSO”; Hetʹmana Pavla Skoropadsʹkoho St., 4, 40000 Sumy , Ukraine
7. 7 Department of Financial Technologies and Entrepreneurship , Sumy State University ; Rymskogo-Korsakova St., 2, 40007 Sumy , Ukraine